This 9v battery contained six cells stacked like a layer cake
Picture of a disassembled Duracell 9v battery. Below the terminal assembly is a clear plastic case where you can see six sets of stacked rectangular terminals and fillings.
I hope so. I don't know if it would work to make a smartphone in a clear plastic case like that phone, but if someone did it, people would probably just complain because it was plastic and not metal or something.
I can't remember who did it, but there's a YouTuber who always clearifies his phones when he gets a new one by removing the back and putting a gorilla glass back on it. Haven't seen his videos in a while, I don't think, but he has several iirc.
IIRC there's a transparent version of the Fairphone 5. Not that it's as aesthetically interesting inside as older tech, more of a statement about the device's modular design.
I just looked it up. It's a little too opaque for my tastes based on what I'm talking about but you're right, it's not as interesting inside. Maybe that's why other companies stopped doing it. It still makes sense if you want to show off the design of the device in a specific way like you said.
About a decade ago I told my spouse I wanted to customise my PC with a perspex case and some lighting inside. He was all bleurgh, why would you want to do that?! His current PC has a glass side and rainbow lights inside.
I also stand by this claim and have since the 90s. Thank you and good day, sir.
A friend of mine had one as a teenager and then brought it with him to his dorm room after high school. We called it Pavlov because it had to be answered when it rang.
I saw one of these at Target the other day in the $5-and-below section. Except it wasn't a full phone, it was a nostalgia grab designed to be a wired "headset" for a cell phone with a headphone jack.